Skiving-machine.



No. 643,494. Patented Feb. 13, I900.

J W FULLER SKIVING MACHINE.

Appl a nfil dA g 4 1899 2 Sheets-Sheet I.

(No Model.)

Patented Feb. I3, I900. J W FULLER SKIVING MACHINE.

(Application filed. Aug. 4, 1899.]

2 SheetsSheet 2.

(No Model.)

NITED STATES PATENT FFICE.

JOHN WVOODBURY FULLER, OF DALTON, MASSACHUSETTS.

SKlVlNG-MACHINE.

SPECIFICATION formingpart of Letters latent N 0. 643,494, dated February 13, 1900.

' Application filed August 4, 1899. Serial No. 726,114. (No model.)

To all whom/ it may concern:

Be it known that I, JOHN WooDBURY FUL- LER, of Dalton, county of Berkshire, State of Massachusetts, have invented an Improvement in Skiving-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention relates to a machine for skiving leather, and is intended more especially for removing a portion of a sole-blank next the heel to form a seat for the shoe-heel. Ordinarily the heel-seats are formed by bufiing-wheels, and in such a case as thisthe leather is removed inthe form of a powder and is thereby wasted but with my improved machine, however, I utilize the pieces that are skived or sliced off to form boxtips, thereby securing economy.

My improved machine in the embodiment thereof illustrated in the accompanying drawings includes in its organization blank feeding or presenting means and a skiving-knife disposed in working relation to the feeding means, and in the present case the cutting edge of the knife is deflected for a portion of its length, so as to form a seat of proper depth and shape as the blank or stock is moved transversely by the knife.

In the drawings, Figure l'is a side elevation, with portions broken away, of a skivingmachine constructed in accordance with my invention. Fig. 2 is a front elevation of the machine. Fig. 3 is a perspective view of a portion of the main or driving shaft of the apparatus upon an enlarged scale and showing the coupling which unites the two sections of said shaft and the several parts thereof as detached. Fig. 4 is a perspective view, upon an enlarged scale, of the knife; and Figs. 5 and 6 are views in edge elevation and plan, respectively, of a sole-blank after the formation of a seat therein.

The improved machine or the different parts thereof maybe sustained upon any kind of suitable framework, that represented consisting of a main frame or table 12 and an auxiliary frame or head 13, which sustains the driving mechanism and other parts of the apparatus, hereinafter more particularly described.

The blank is fed to the skiving-knife by suitable instrumentalities, involving in the present case the superposed rolls R and R, the lower roll being corrugated or fluted upon its periphery, as is customary with this class of feed appliances, to obtain a better grip upon the blank and hold the same against lateral movement. The rolls are carried upon the shafts S and S, carried by suitable bearings upon the upper frame or head 13, the shafts being disposed in parallelism horizontally, and the lower one, which is in two sections, as will hereinafter appear, constituting the driving-shaft. The lower shaft S is provided with a driver of suitable kind, such as the cone-pulley D, and it is connected by intermediate gearing, as 14, to the upper shaft S. The lower shaft S consists of two sections 15 and 16, connected by a joint or coupling, which permits movement of the shaft-' section 16 relatively to its companion, said shaft-section 16 being yieldingly supported by the yoke 17.

The joint which unites the two parts of the shaft S is denoted by J and is shown in detail in Fig. 3, and it includes in its construction the three disk members 20, 21, and 22, the parts 20 and 21 being secured, respectively, to the shafts, while the disk 22 is interposed between the same and is provided upon its opposite faces with the diametrical and transversely-disposed tongues or fins 23 and 24. The tongue 23 is fitted for limited sliding movement in the groove or channel 25 upon the adjacent face of the part 20, while the tongue 24 is similarly disposed within the groove or channel 26 upon the contiguous face of the disk 21. The ribs or tongues 23 and 24 extend entirely across the opposite faces of the disks 22 diametrically thereof and are disposed at right angles to each other, and when they are fitted in the proper grooves therefor, as shown in Fig. 1, the shaft-section 16 can be shifted vertically relatively to its mate, although the movement at no time is very great, the shaft-section 16 being yieldingly supported simply to permit the lower roll to recede when any unusual obstructions or projections are encountered in the blank.

The yoke 17 is provided upon its under side with the downwardly-extending stem or projection T of/two diameters. The larger portion or head of the stem is denoted by 30, and it is snugly fitted within the cylindrical casing 31, which rises from the framework, and the smaller portion of the stem is likewise disposed in the thimble 33, inclosed by the substantially cylindrical housing 34 upon the under side of the flange 13 of the auxiliary frame 13. The cylindrical housing or casing 34, in which the sleeve or thimble 33 is adjustably mounted, is closed at its lower end, while the upper end is provided with an annular outwardly-extending flange 35, adapted to receive at suitable intervals the screws 36,which are in threaded engagement wit-h the flange 13, thereby serving to hold the housing in place.

The stem T or the reduced portion thereof is surrounded by the coiled protractile spring 37, which is fitted within the cylindrical bearing-sleeve 31, and the opposite ends of the spring bear against the head of the stem T and the relatively-fixed thimble 33, thereby to hold the lower roller R in proper position, and if any projections are in the stock they will cause the roller R to recede, and thereby slightly compress the spring 37, and when the projection has passed out of contact with the roll it will be returned to its initial position by the spring.

The thimble which receives the lower end of the stem 30 and which also sustains the lower end of the spring 37, is adjustable for the purpose of regulating the tension of the spring and also the position of the lower roll.

The lower closed end of the cylindrical casing 34 is centrally bored and is threaded to receive the screw 40, the upper end of which bears against the thimble 33 and the lower end of which is provided with a hand-wheel 41 to regulate the position of said thimble, and consequently the adjustment of the parts controlled thereby.

The skiving-knife is denoted by K, and it has a beveled edge or face 45 upon its inner side, which produces the cutting edge 47, extending between the points at and 0;, and it will be seen upon inspection of Fig. 4 that the cutting edge is deflected upward for a portion of its length and between the points .12 and w, the contour of the deflected portion being curved.

The carrier for the knife is denoted by A, and it consists of a plate substantially L shaped in cross-section, the flat under face of the knife being adapted to fit against the upper face of the horizontal portion of the carrier and to be clamped thereto by the heads of the screws 50 and 51, passing through the longitudinal slots 52 and 53 and in threaded engagement with the carrier A.

The skiving-knife K is adjustable toward the rollers to take up wear in the cutting edge thereof, and for this purpose I have shown the adjusting-screws 55 and 56 in line with the clamping-screws 50 and 51, (shown clearly in Fig. 1,) and the heads of which are adapted to engage the outer edge of the knife. To adjust the knife, the clamping-screws 50 and 51 will be loosened and the adjusting-screws 55 and 56 turned farther into their seats, so that the heads of said last-mentioned screws by engaging the knife can move the same squarely forward, and when the knife is in the proper position the clamping-screws will be tightened.

The carrier A is secured to the auxiliary frame or head 13 in some convenient manner, and for this purpose I have shown the following instrumentalities: The lug 60 is adapted to receive the screw 61 in threaded engagement therewith, the upper end of which fits against said carrier, said screws serving to elevate the carrier and being provided with check and holding nuts, as is customary. The screw 63 cooperates with the screw 61 in upholding the carrier, and it is in threaded engagement with the framing 13, and it extends through the elongated slot 64 of the carrier, such slot permitting a certainamount of vertical movement of the carrier, and the binding of the head of the screw 64 against the outer face of the carrier serves to firmly hold the same in a desired position.

The blank B is fed forward between the rollers R and R with the under or flesh side next the lower roll, as I prefer to form the seat upon the grain side of the stock, and it is presented squarely to the knife, which slices off sufficient of the material at the heel to form a seat of the proper depth, the latter, of course, being regulated by the vertical adjustment of the carrier in the manner previously described, and the longitudinal seetional outline of the heel-seat will agree in contour with that of the cutting edge 47 of the knife, as represented clearly in Figs. 5 and 6, wherein the heel-seat is denoted by 65, the inner wall 66 of said seat being shown as rounded. The rear or heel end of the blank B is squared off, as at 70, and is fitted against the flat face of the adjustable gage-plate 71, whereby the proper length of out can be made and can be also regulated by the adjustment of the gage-plate 71 toward and from the front of the machine. The gage-plate is provided upon its rear face with an inwardly-projecting stem 7 2,substantially rectangularin crosssection and adapted to fit within the shallow square groove 73 upon the lug 74, by reason of which the stem,and consequently the gageplat-e thereon, cannot be turned. The gageplate is held in position and against endwise movement of the rolls R and R by the setscrews '75, passing through the stem 72 and in threaded engagement with the lug, the head of the screw serving to bind against the stem, thereby to hold the gage-plate in its adjusted position.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a machine of the class described, a skiving-knife, two cooperative feeding-rolls located to present the blank to said knife, a supporting member for one of the rolls provided with a stem, a thimble adapted to receive said stem, a spring bearing respectively against the stem and the thimble, a casing upon the framework in which said thimble is slidingly mounted, and an adjusting member for said thimble.

2. In a machine of the class described, a skivi-ng-knife, two superposed feeding-rolls located in adjacence and adapted to present the blank to the knife, a yoke supporting one of the rolls and provided with a stem of two diameters, a casing adapted to receive the stem, an adjustably-mounted device for receiving one end of the stem, and a spring surrounding the reduced portion of the stem and bearing against the enlarged portion thereof and also against said adj ustablymounted device.

3. In a machine of the class specified, a skiving-knii'e, two superposed feeding-rolls located in adjacence and adapted to present the blank to the knife, a yoke supporting one of the rolls and provided with a stem of two diameters, a casing adapted to receive the stem, a thirnble located to receive one end of the stem, a casing inclosing said thimble, an adjusting-screw adapted to bear against the thimble and provided with a hand wheehand a spring surrounding the stem and acting against the same and also against said thimble.

4. In a machine of the class specified, a skiving-knife, a substantially L-shaped carrier for said skiving-knife, the knife resting upon the horizontal portion of the carrier and having two elongated slots, clampingscrews passing through said slots and in threaded engagement with said horizontal portion,t\vo adj Listing-screws in alinement respectively with the first-mentioned screws and serving to directly engage the knife to adjust the same, a screw extending through a vertical longitudinal slot in the vertical portion of the carrier, and an adjusting-screw bearing against said vertical portion and in alinement with said last-mentioned screw.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN WOODBURY FULLER.

Witnesses:

JOHN H. BELLOWS,

EDWARD H. BREWER. 

